1 files changed, 111 insertions, 0 deletions
diff --git a/engine/src/core/com/jme3/collision/bih/BIHTriangle.java b/engine/src/core/com/jme3/collision/bih/BIHTriangle.java
new file mode 100644
index 0000000..2229da0
--- /dev/null
+++ b/engine/src/core/com/jme3/collision/bih/BIHTriangle.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.collision.bih;
+
+import com.jme3.math.FastMath;
+import com.jme3.math.Vector3f;
+
+public final class BIHTriangle {
+
+    private final Vector3f pointa = new Vector3f();
+    private final Vector3f pointb = new Vector3f();
+    private final Vector3f pointc = new Vector3f();
+    private final Vector3f center = new Vector3f();
+
+    public BIHTriangle(Vector3f p1, Vector3f p2, Vector3f p3) {
+        pointa.set(p1);
+        pointb.set(p2);
+        pointc.set(p3);
+        center.set(pointa);
+        center.addLocal(pointb).addLocal(pointc).multLocal(FastMath.ONE_THIRD);
+    }
+
+    public Vector3f get1(){
+        return pointa;
+    }
+
+    public Vector3f get2(){
+        return pointb;
+    }
+
+    public Vector3f get3(){
+        return pointc;
+    }
+
+    public Vector3f getCenter() {
+        return center;
+    }
+
+    public Vector3f getNormal(){
+        Vector3f normal = new Vector3f(pointb);
+        normal.subtractLocal(pointa).crossLocal(pointc.x-pointa.x, pointc.y-pointa.y, pointc.z-pointa.z);
+        normal.normalizeLocal();
+        return normal;
+    }
+
+    public float getExtreme(int axis, boolean left){
+        float v1, v2, v3;
+        switch (axis){
+            case 0: v1 = pointa.x; v2 = pointb.x; v3 = pointc.x; break;
+            case 1: v1 = pointa.y; v2 = pointb.y; v3 = pointc.y; break;
+            case 2: v1 = pointa.z; v2 = pointb.z; v3 = pointc.z; break;
+            default: assert false; return 0;
+        }
+        if (left){
+            if (v1 < v2){
+                if (v1 < v3)
+                    return v1;
+                else
+                    return v3;
+            }else{
+                if (v2 < v3)
+                    return v2;
+                else
+                    return v3;
+            }
+        }else{
+            if (v1 > v2){
+                if (v1 > v3)
+                    return v1;
+                else
+                    return v3;
+            }else{
+                if (v2 > v3)
+                    return v2;
+                else
+                    return v3;
+            }
+        }
+    }
+
+}